Hydrocarbon motor



Patented Dec. 9, 1924.

UNITED STATES PATENT OFFICE.

EUGENE M. G. LEPERE, OF PARIS, FRANCE, ASSIGNOR T PACKARD MOTOR OAR COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

HYDROCARBON MOTOR.

Application filed March 1, 1920.

To all whom it may concern:

Be it known that I, EUoiiNE M. G. Lnrisnn, a citizen of the Republic of France, and resident of Paris, France, have invented certain new and useful Improvements in Hydrocarbon Motors, of which the following is a specification.

This invention relates to hydrocarbon motors and more particularly to means for adjusting the pressure on the springs which operate the valves in their return movement.

The principal object of the invention is to provide adjustment means which shall be readily accessible and which may be adjusted without the necessity of removing the valves and valve stems from their sup ports.

Other objects of the invention will appear from the following description.

The invention is embodied in preferable form in the construction and arrangement hereinafter described and illustrated in the accompanying drawings, in which drawings:

Figure 1 is a vertical sectional view through an overhead valve mechanism of a hydrocarbon motor, showing my improvements applied thereto,

Figure 2, an enlarged detail cross section on the line 22 through the adjusting nut and valve stem,

Figure 3, a vertical section. on the line 3-3 of Figure 1, and

Figure 4, a detail perspective of the upper end of the valve stem.

Referring to the drawings, indicates the valve cage of a hydrocarbon motor of the overhead valve type. 11 is a valve having a stem 12 which is mounted to reciprocate in a guide 13 having a flange 14- adapted to rest upon the wall 15 of the valve cage. The valve stem 12 is provided at its upper end with a threaded part 16 with which engages an adjusting nut 17. This nut also constitutes acontact member and is adapted to receive the pressure of the rocker arm 18 which is operated by a cam 19 so that when the cam depresses the rocker arm the valve Serial No. 362,593.

will be opened. The valve is adapted to be returned to closed position by means of a spring 20 confined between the flange 14: and a cup or annulus 21 having a square opening 22 therethrough adapted to loosely fit a squared portion 23 formed on the threaded part of the valve stem. This annulus is provided on its upper surface with inclined teeth 24 adapted to engage similar inwardly projecting teeth 25 formed on the under face of the adjusting nut 18.

In order to adjust the pressure on the valve spring the annulus ispressed down by the fingers or by a suitable tool which may be readily inserted through an opening in the casing 26 in which the valve operating mechanism is mounted and thereupon the adjusting nut may be turned on the stem by hand or by a tool either up or down in order to extend or limit the expansion of the valve spring and the consequent pressure on the valve. After such adjustment has been effected the annulus is permitted to spring back into place and the teeth thereon will engage the corresponding teeth of the nut, thus locking the nut against movement around the stem, the annulus itself being retained against turning thereon by the engagement of the square aperture with the squared portion. of the stem.

Having thus described my invention, what I claim and desire-to secure by Letters Patent is:

In a hydrocarbon motor, the combination with a valve, its spring and its operating devices, of a stem having a threaded end portion with a circun'ifercntial squared intermediate portion, a dished member forming an. abutment for the spring and slidably mounted on the squared portion of said stem, and a nut adapted for cooperation with the end portion of the stem, said nut having toothed means for engaging the dished memher to prevent relative rotation therebetween.

In testimony whereof I aflix my signature.

EUGENE M. G. LE-PERE. 

